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  • Title: Pharmacokinetics and serum concentrations of antimycobacterial drugs in adult Turkish patients.
    Author: Babalık A, Ulus IH, Bakirci N, Kuyucu T, Arpag H, Dagyildiz L, Çarpaner E.
    Journal: Int J Tuberc Lung Dis; 2013 Nov; 17(11):1442-7. PubMed ID: 24125448.
    Abstract:
    OBJECTIVE: To document the pharmacokinetics and serum concentrations of first-line anti-tuberculosis drugs in adult Turkish patients with pulmonary tuberculosis (PTB). DESIGN: Consenting 21 adult patients (aged 38 ± 4 years, 10 female and 11 male) with newly diagnosed active PTB participated in the study. Blood samples were collected 1, 2, 4, 6 and 24 h after simultaneous isoniazid (INH), rifampicin (RMP), pyrazinamide (PZA) and ethambutol (EMB) ingestion. Serum concentration-time profiles, maximum serum concentrations, time to achieve maximum serum concentrations, the half-life and the areas under the serum concentration-time curve for each of the four drugs were determined. RESULTS: Wide variations in pharmacokinetic parameters were observed among patients. In respectively 8 (38%), 17 (81%), 3 (14%) and 1 (5%) patients, the maximum INH, RMP, PZA and EMB serum concentrations were below the accepted therapeutic concentrations. CONCLUSION: Our data show that the serum concentrations of anti-tuberculosis drugs varied considerably in the study patients. Therapeutic drug monitoring is necessary to identify patients with subtherapeutic INH and RMP serum concentrations.
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